Growth and characterisation of phosphate mixed ZTS single crystals

The growth of zinc tris (thiourea) sulfo-phosphate, ZTSP, single crystals f rom aqueous solution by a low temperature solution growth technique is repo rted. ZTSP crystals were grown by partial substitution of sulfate with phos phate. The growth was carried out for different mol.% of phosphate and the incorporation of phosphate in the grown crystals was quantified by ICP anal ysis. The incorporation of phosphate in the grown crystals was qualitativel y analysed from FTIR studies. Morphological changes have been observed for the crystals grown at different mol.% of phosphate. Absorption spectra take n for the pure and phosphate mixed ZTS crystals reveal that the phosphate m ixed ZTS crystal may be a better nonlinear optical (NLO) material for secon d harmonic generation (SHG). The Vicker's microhardness number was found to increase with phosphate substitution. (C) 1999 Elsevier Science S.A. All r ights reserved.